Milling cutter with precision adjustment
AssigneeSandvik Intellectual Property AB
InventorsGünter Wermeister, Stefan Knecht, Rudolf Lohr
Life of this patent
Estimating the term…
Abstract
A cutter insert for disc-milling cutters, in particular, for milling crankshafts. The insert has upper and lower surfaces and circumferential lateral surfaces, which connect the upper and lower surfaces to one another. The insert includes raised swellings and/or projections on the upper surface, at least in the region of two corners, which preferably extend over the entire length of one side of the cutter insert, so that, in a view perpendicularly toward a cutting face formed by at least one of the lateral surfaces, the edge which defines the transition from the upper surface to the cutting face, has a portion projecting relative to the central edge section in the region of each of the two ends of this edge.
Claims34
A cutter insert for a disc-milling cutter, comprising upper and lower surfaces joined by peripheral side surfaces, a first of the side surfaces defining a cutting face extending from a second side surface to a third side surface and forming two substantially ninety degree corners with respective ones of the second and third side surfaces as viewed in a direction toward the upper surface;
- the upper surface including a center portion and two raised projections;
- the projections being disposed at respective ones of the two corners, wherein a transition edge defined between the upper surface and the cutting face includes a central edge portion and two raised edge portions disposed at opposite ends of the transition edge and defined by respective ones of the projections, each of the raised edge portions defining a main cutting edge which transforms into a minor cutting edge defined by a respective one of the two corners, wherein the two minor cutting edges are convergent in a direction toward the bottom surface.
A cutter segment adapted to be mounted on a disc-milling cutter, the cutter segment including a body curved about an axis arranged to coincide with an axis of rotation of the disc, the body including a seat receiving a cutter insert, the seat including a radially outwardly facing insert support surface extending from an axially facing end face of the body, the support surface inclined at an acute axial angle relative to the axis, wherein an end of the support surface spaced remotely from the end face is located closer to the axis than is an end of the support surface situated at the end face, wherein the cutter insert comprises upper and lower surfaces joined by peripheral side surfaces, a first of the side surfaces defining a cutting face extending from a second side surface to a third side surface and forming two substantially ninety degree corners with respective ones of the second and third side surfaces as viewed in a direction toward the upper surface, the upper surface including a center position and two raised projections, the projections being disposed at respective ones of the two corners, wherein a transition edge defined between the upper surface and the cutting face includes a central edge portion and two raised edge portions disposed at opposite ends of the transition edge and defined by respective ones of the projections, each of the raised edge portions defining a main cutting edge which transforms into a minor cutting edge defined by a respective one of the two corners, wherein the two minor cutting edges are convergent in a direction toward the bottom surface.
A cutter insert for a disc-milling cutter, comprising upper and lower surfaces joined by peripheral side surfaces, the side surfaces intersecting one another to form corners;
- the upper surface including a center portion and two raised projections;
- the projections extending along an upper portion of two opposite ones of the peripheral side surfaces, at least one of the side surfaces defining a cutting face forming a substantially ninety degree angle with each of two adjacent side surfaces as viewed in a direction toward the upper surface, wherein a transition edge defined between the upper surface and the cutting face includes a central edge portion and two raised edge portions, the raised edge portions disposed at opposite ends of the transition edge and defined by respective ones of the projections, each raised edge portion extending higher than the central edge portion;
- and a hole extending through the insert from the upper surface to the lower surface.
Dependencies are inferred from the claim text.